While on holiday in the US in the mid-1970s, Madejski saw a car sales magazine that included pictures of the vehicles on sale. He immediately realised the potential of the idea and with the help of his business partners
Paul Gibbons and Peter Taylor founded
Thames Valley Trader in 1976. Initially the magazine advertised a range of items, from houses to cars and aircraft, but it soon concentrated on vehicles and was renamed
Auto Trader. Madejski partnered with the
Guardian Media Group in 1982 to give the title national exposure. By 1998, 52 titles were being published with a combined circulation of more than 700,000. In 1998, he sold his company
Hurst Publishing for £174 million.
Reading F.C. Madejski became chairman of the
Football League club
Reading F.C. in 1990, and has given his name to the club's
Madejski Stadium, built in 1998 with £25 million largely contributed by him. He rescued Reading from
receivership. He said "When
Robert Maxwell was alive I offered him five pounds a share. When he fell off his boat I got them for 10p. Funny old life isn't it?". In 2006, he led the club to the top tier of English football for the first time in its 135-year history and proposed to expand the stadium to 38,000 seats. After
Premier League promotion, Madejski said he was ready to sell up:The brand is getting stronger all the time and if there is a billionaire who wants a nice accessory down the
M4 then come and talk to me. Apart from
Manchester United, unless you've got a sugar daddy with really deep pockets, you're wasting your time. The club achieved pre-tax profits of £6.6 million during the tax year ending in June 2007. On 21 January 2012 it was announced that Madejski planned to relinquish control of the club by selling a 51% stake for £40 million to Thames Sports Investments, a Russian consortium headed by
Anton Zingarevich. Madejski announced that as part of the deal he would continue as chairman for at least another two years, followed by becoming honorary life president. Madejski's ownership of the club ended on 29 May 2012 when the takeover deal was completed. ==Charitable activities==